Whitening-machine.



I PATEN'TED JULY 2, 1907; T. P. coomBs. WHITENING MACHINE. APPLICATIONFILED 001227, 1903.

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PATENTED JULY 2, 1907.

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PATENTED JULY 2, 1907, 'r. P. commas. WHITENING MAGHINB.

APPLICATION FILED 001-27, 1903.

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OFFICE;

THOMAS P. GOOMBS, OF'PEABODY, MASSACHUSETTS,ASSIGNOR, BY MESNEASSIGNMENTS, TO

THE TURNER TANNING MACHINERY COMPANY, OF BOSTON, MASSACHUSETTS, A COR-PORATION OF MAINE.

WHITENING-MACHINE.

Specification of' Letters. Patent.

Patented July 2, 1.907.

Application filed October 27,1903. Serial No. 178,719.

To all whom it may concern.

Be it known that I, THOMAS P .COOMBS, a citizen of the United States,residing in Peabody, in the county of Essex and State of Massachusetts,have invented an Improvement in Whitening-Machines, of which thefollowing description, in connection with the accompanying drawings, isa specification, like letters on the drawings representing like parts.

This invention relates to a machine for treating hides, skins andleather, and more particularly for whitening the same.

The present invention has for its object to provide a machine for thepurpose specified, which can be operated with a minimum expenditure oflabor on the part of the operator and which can be operated with aminimum mechanical power. 7

The particular features of the invention will be pointed out in theclaims at the end of this specification.

Figure 1 is a side elevation of a machine embodying this invention. Fig.2, a front elevation of the machine shown in Fig. 1. Fig. 3, a detail inside elevation on an enlarged scale of the bed and its supportingmechanism shown in Fig. 1. Fig. 4, a plan view of the parts shown inFig. 3 with a portion of the bed broken away, and Fig. 5, a detail inplan of the treadle mechanism to be referred to.

Referring to the drawings a, b, represent side frames or uprights, whichare suitably connected together to constitute the framework of themachine and between which the main operating parts are located. The sideframes (1, b, at the front of the machine support the pivots c, d, fortwo substantially straight levers e, f, (see Figs. 1 and 3), which arearranged in substantially a straight line and support the bed 9 for thehide or skin. The lever e has pivotally connected with its rear end alink h provided with a round head 11, which fits into a correspondinglyshaped socket in the under side of the bed, and the lever f at its frontend is provided with lugs or projections 9', between which are pivotedblocks m having threaded holes nfor the reception of threaded rods orlinks 0, which support the front end of the bed and are provided withrounded upper ends to fit correspondingly shaped sockets in theunderside of said bed. The threaded rods or links 0 may have fast onthem hand wheels p, by means of which the threaded rods may be turned soas to tilt or adjust the bed longitudinally, when so desired.

The levers e, f, are connected by the links 8, 9 (see Fig. 4) to theopposite sidesof a lever 10 having its pivot 12 supported by the sideframes, the said lever having its rear arm 13 provided with acounterweight 14 adjustably secured thereon as by the set screw 15, andhaving its front end provided with a hole or opening 16 through whichextends a vertically arranged rod 17, which is provided at its oppositeends as shown, with screwthreads 18, 19. The rod 17 has mounted upon itsthreaded upper end 18 hand wheels 20, 21, the upper one 20 of which maybe rendered fast on the rod 17 to turn therewith, and the lower one 21of which is provided with a threaded hub 23 which engages thescrewthreads 18 and between which and the lever 10 is interposed ahelical spring 24, which encircles the rod 17 andbears against twowashers 25, 26 loose on said-rod. The wheel 21 is locked in its adjustedposition by the check nut 28. The rod 17 below the lever 10 is providedwith a washer 30 and check nuts 31, and has its threaded end 19 extendedthrough a threaded hole 32 (see Fig. 5) in a block 33pivotally supportedby pins or screws 34 between arms 35 on a hub or sleeve 36, loose on ashaft 37 and provided with a crank or arm 38 (see Figs. 3 and 5), whichprojects over an arm 39 of a foot treadle 40 pivotally mounted on theshaft or rod 37. The crank or arm 38 may and preferably will be providedwith a set screw 41, which extends through it and engages the arm 39 ofthe treadle lever 40.

By reference to Figs. 3, 4 and 5, it will be seen that depression of thefoot treadle 40 rocks the sleeve or hub 36 on the shaft 37 and drawsdown the threaded rod 17-, thereby causing the spring 24 to force thefront end of the lever 10 downward. As the lever 10 moves downward, thelinks 8, 9 cause the adjacent ends of the levers e, f to move downward,and the outer ends of the same to move upward, thereby through the rodsor links h, 0, elevating the bed 9 into its operative position. When thebed is in its elevated position, it is capable of yielding to compensatefor unevenness in the work, by means of the spring 24, the tension orpressure of which can be adjusted by the hand wheel 21. When the foottreadle 40 is released, the counterweight 14 turns the lever 10 so as tolower the bed. The bed supporting'and operating mechanism is sensitivein operation and requires but little effort on the part of the workmanto operate it.

Another feature of the present invention consists in providing a simple,efficient and easy drive for the knife cylinder 45 and one which can beoperated with a minimum power.

The knife cylinder 45 is mounted in hangers 46 pivotally mounted on ashaft 47, which is journaled in the lower ends of two parallel pendulums48 hung from a pivot 49 carried by the long arms 50 of elbow levers 51,mounted on a pivot shaft 52 supported by the side frames a, b, the shortarms of .said levers having connected to them links or rods 53, whichreciprocate in suitable guides 54 attached to the framework of themachine and are encircled by helical springs 55, which exert a yieldingpressure upon the knife cylinder.

The pendulum levers 48 are connected by the compensating links with theside frames of the machine. The hangers 46 for the knife cylinder carryadjustable supports or boxes 61 for the shaft of a grinding wheel 62,and idler wheels 63. The hangers 46 have their lower ends joined bylinks or rods 65 to connecting rods or bars 66.

In order to obtain the desired drive above referred to, the connectingrods 66 are joined to a pin or pivot 67 carried by a crank or arm 68 ona main or driving shaft 69, which is rotated in any suitable manner, thesaid main shaft being shown in Fig. 2, as provided with a fast pulley 70and with a loose pulley 71. The pin or pivot 67 has mounted on it asubstantially large driving wheel 72, which is connected by the belt 73with a pulley 74 on the shaft 47 carried by the pendulums, which shaftis connected with the knife cylinder and with the grinding wheel 62, bybelts 75 passed about pulleys 7 G on the opposite ends of the shaft 47,under the idler pulleys 63, over pulleys 77 on the shaft of the grindingwheel 62 and under pulleys 78 on the shaft of the knife cylinder.

The main shaft 69 is provided with a crank or arm 80 having attached toit a weight 81 to counterbalance the weight of the pulley 72. The leverse, f, 10 and the sleeve 36 and foot treadle 40 may be mounted upon ballbearings 82 to still fin'ther reduce friction to be overcome by theworkman, when the bed g is' elevated.

The operation of the machine herein shown may be briefly described asfollows. The hide or skin to be treated is laid upon the bed 9 in itslowered position and is brought into engagement with the cuttingcylinder 45 by the operator depressing the foot treadle. The cuttingcylinder is moved backward over the bed in contact with the hide or skinand is moved forward out of contact with the hide or skin, by therevolution of the crank shaft. The cutting cylinder 45 is driven by thebelts 75 from the shaft 47, which is rotated by the belt 73, motion towhich is imparted by the pulley 72 which is rotated on the pin 67 by therotation of the crank 68 and its shaft 69.

Claim.

1. In a machine of the character described, in combination, awork-supporting bed, a spring actuated lever, levers for supporting saidbed interposed between said spring actuated lever and said bed, meansfor connecting one of said bed supporting levers with said springactuated lever, separate means for connecting the other bed supportinglever with said spring actuated lever, a spring to engage said springactuated lever, a substantially vertical rod encircled by said springand extended loosely through the spring actuated lever, a pivoted blockconnected with said rod, a sleeve or hub to which said block is pivoted,and a foot treadle co-operating with said sleeve, substantially asdescribed.

2. In a machine of the character described, in combination, a worksupporting bed, :1 spring actuated lever, levers for supporting said bedinterposed between said spring actuated lever and said bed, means forconnecting one of said bed supporting lovers with said spring actuatedlever. separate means for connecting the other bed supporting lever withsaid spring actuated lever, a foot treadle, and a spring operated bysaid foot treadle to actuate said spring actuated lever, substantiallyas described.

3. In a machine of the character described, in combination, a worksupporting bed, a spring actuated lever, mechanism connecting said levelwith said bed and interposed between the same, a substantially verticalrod extended loosely through said lever, a spring encircling said rodand acting on said lever, a foot treadle, and means for operativelyconnecting said foot treadle with said rod, substantially as described.

4. In a machine of the character described, in combination, a worksupporting bed, substantially straight levers pivoted intermediate theirends and arranged substantially parallel with said bed, means interposedbetween said levers and bed for supporting the bed upon said levers,links connected to the adjacent ends of said levers, a lever to whichsaid links are connected, a yielding medium acting on the upper side ofsaid lever, a substantially vertical rod extended loosely through thelever acted upon by the yielding medium, and a foot treadle operativelyconnected with said rod below the lever through which said rod isextended, substantially as described.

5. In a machine of the character described, in combination, a verticallymovable work supporting bed, a lever for raising the same, a foottreadle, a rocking sleeve engaged by said treadle and provided witharms, a block pivoted between said arms, a substantially vertical rodconnected with said block and extended up through said lever, 11yielding medium on said rod above said lever, and means on said rod forregulating the pressure of the yielding medium on said lever,substantially as described.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

THOMAS P. COOMBS.

Witnesses:

S. G. I-I. FI'rc1'r, A. M. WILSON.

